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Planning to convert boat to electric, need parts and advice

Discussion in 'Electric Conversions' started by drtomca, Mar 21, 2015.

  1. drtomca

    drtomca New Member

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    I have a Zodiac Hurricane with a 200 hp diesel over jet drive. Jet is driven by toothed belt. Looking to convert to electric. The 85S has the right horsepower. Need all components and tech support.

    Tom
     
  2. BerTX

    BerTX Member

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    #2 BerTX, Mar 22, 2015
    Last edited: Mar 22, 2015
    Wow. I assume you have already researched this in online electric boat forums before coming to a car forum.

    I'll take a swing at this...

    Displacement boats are very inefficient. Planing boats are worse.

    First, you need to see the effect of carrying an extra 1300 pounds of weight (the batteries) on your boat's performance. Secure three 55 gallon drums on deck and fill them with water, then measure the gph of fuel you use to plane the boat. Since you probably use about 20 gph at WOT, let's guess at 14 gph (assuming you can get it to plane).

    A car the size of a Tesla uses about 2 gph going 60 mph, so your boat uses about 7 times as much energy per hour as it takes to drive a car.

    The Tesla can go for about 4 hours (240 minutes) on a charge at 60 mph. 240 min / 7 = about 35 minutes.

    So you'll be able to have 35 minutes of fun, then just pull into the Supercharger at your local marina -- oh wait. No, you'll have to find a marina that had 50 amp service, and wait the 8 hours for the boat to charge.

    My numbers are estimates, sure, but close enough.

    Oops, just saw in your post that you have a diesel. Probably less fuel usage so my calculations are off. Maybe you get 45 minutes run time.
     
  3. dhrivnak

    dhrivnak Active Member

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  4. eco5280

    eco5280 Member

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    All I can think of is dropping a toaster into a bathtub. High voltage + water = not a great combination.
     
  5. LazMan

    LazMan Member

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  6. gavine

    gavine Petrol Head turned EV Enthusiast

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  7. richkae

    richkae VIN587

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  8. Evbwcaer

    Evbwcaer Member

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    A lot of this stuff seems off.

    A car of Tesla's size, the most accurate example being a Tesla, uses about 1/2 gallon equivalent of energy, not 2, per hour going 60mph, ballpark. Right, because the boat is going to be electric we can assume the drive train is something like 3 or 4 times more efficient?

    Regarding weight, you will add the weight of the electric components, but also subtract the diesel engine, the fuel tanks, and the fuel. I imagine a marine diesel engine is a beast and a large tank of fuel is easily a few hundred, if not a thousand pounds.

    Correct me if I am wrong on any of this.

    To Drtomca, just a thought, you could run your diesel on biodiesel or waste veggie oil. That can be a whole other can o' worms, but if you are doing this for ecological reasons you could be just as beneficial for less costs and maintain all functionality. I used to be a veggie oil guy, but solar charging a Tesla is so much less work, and none of the mess.

    Good luck with your project.
     
  9. richkae

    richkae VIN587

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    If you read the details on the electric boat I posted here:
    Ruckmarine Electric Sportboats - KONA 17 Specifications

    Top speed: 27mph
    Planing speed: 15mph
    Time at top speed: 30 min
    Time at planing speed: 45 min
    Time at 5mph: 3.5+ hours

    Battery size: 12.8 kWh
    Battery weight: 328 pounds
    Boat displacement: 1490 pounds

    Those seem like reasonable performance goals, since it has actually been done and better than any napkin calculations.
     
  10. mspohr

    mspohr Active Member

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    This is a real complex DIY project. Fortunately, there are companies which have done all the hard part of engineering and assembly. So, unless you will enjoy spending a few years in your garage (rather than on the water), you might want to consider just buying something:
    ElectraCraft Electric Powered Boats | Complete line of electric boats
     
  11. BerTX

    BerTX Member

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    Maybe I'm missing your point. Those look freakishly close to the performance numbers I'm reading off the napkin.:eek:

    What I understood was that he was taking the running gear from a Tesla and putting it in this boat:

    zodiac.jpg
    It's a little larger than this boat:

    zrib.jpg
     
  12. ruckmarine

    ruckmarine New Member

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    For reference, Torqeedo equipped a Zodiac Milpro SRM650 with its Deep Blue 80HP outboard. [FONT=arial, sans-serif] [/FONT]https://youtu.be/8V7j1RhvpfY The same system is available as [FONT=arial, sans-serif]inboard.[/FONT]

    BTW, the KONA 17 was recently upgraded with dual-batteries and 80HP Deep Blue and is now running up to 38 MPH. https://youtu.be/sH1D1PA0Dgg
     
  13. tga

    tga Active Member

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    Hmm... I have an 80's era Evinrude outboard that hasn't run in 20 years...

    - - - Updated - - -

    I'm not sure I'd call 45 min of runtime on plane, for $50k, a "reasonable performance goal"

    I hate to be a buzzkill, but practical performance electric boats (and planes) are a long way off, until batteries improve by orders of magnitude. People forget that cars need ~20-30hp at highway cruise. 100's of HP is used for a few second burst off acceleration. Boats and planes can use 100+ HP continuously. 100hp would kill an 85kWh battery ~1 hour.
     
  14. smasterson2

    smasterson2 Member

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    Very do-able. I converted my 2016 Bayliner 175 to all electric and I love it. Here is a link.
     
  15. smasterson2

    smasterson2 Member

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    Did mine in a couple of months. Pretty easy really.
     
  16. mspohr

    mspohr Active Member

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    Very nice!
     
  17. smasterson2

    smasterson2 Member

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    Thank you very much!
     
  18. tga

    tga Active Member

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    This is very impressive - nice job! I found your other video, I hope you don't mind me posting it:

    This second video has a tour of the installation and gives details of the motor, controllers, etc.

    I'm also impressed that you'd pull the engine out of a new boat - I'm not sure I'd be that brave!
     
  19. smasterson2

    smasterson2 Member

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    I don't mind at all. Thank you for your kind words.
     

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